Fastener assembly



NOMS, 1946. M HATTAN i 2,410,44

FASTENER ASSEMBLY Filed Jan. 11, 1944 nvr/lamme.

Fatented Novg..

i y 2,410,441 l rAsrENEn Assniigmtr' Mark Hatten, Dayton, Ohio Apoiicationiannary ln., 194i; serial-No. '517,303 i arenile-s. 'iones-.221i

(ommen @ed 'the set of March s, 183s,- as

amended Apriii), 1928; 3700. G. 757) The invention described herein may be 'man ufactured and used by or for the Government for governmental purposes, without the' payment to me of any royalty thereon. 1 i

This invention relates to a fastener assembly to be employed to securely fasten members such e operate over long periods of time with freedom from all diiculties.

as sheets, one to the other and so that they willl normally be free of relative movements. At the same time, the fastener will permit of areadyv detachment of 'these members when such detachment is desired.

It is an object of the invention to lfurnish an I assembly of this character 'in which the several parts may be adjusted with minimum effort and in a manner such that the members with which they are associated will be retained iminovablyr` with respect to each other.

A further object is that of designing a fastener assembly, the parts of which may readily be freed from each other when detachment of the members is desired.

An additional object is that of furnishing' a structure of this 'type-andin which, when the i parts are once coupled, an accidental detach ment of thosev parts will be substantially precluded.

A still further object is that oi providing'a iasl tener of a universal type adaptable' to fastening parts ofvarying thickness or size and without theneed of the user of the fastener adjusting any parts at the time of the fastening operation.

'Another object is toprovide a fastener. of the above type in which certain of the cooperatingv elementsA are iloatingly secured to one oi the members,.such as sheetsto be fastened together, said iloating elements being self-centering with respect to another cooperating element adapted to be interlockingly engaged with the floating elements for securing the members, suoli as sheets, together.

Another object is toprovide a fastener oi this type in which means isprovided for audibly signaling the locked and unlocked conditions of the cooperating elements.

Another object of the invention is to provide a fastener of the character referred to having a maximum of strength per unit weight or size.

Another object is that of furnishing a structure of this'nature which will include relatively few parts, each individually simple andrugged indesign, these parts vbeing capable ofv ready manufacture by' quantit" production methods and being thereupon susceptible1 to assemblage by a simple procedure to furnish Aa unit which will vention, and in which: f

Fig. 1 is a sectional side view of a fastener assembly taken on the line i-i of Fig. 2 and showing the parts in fully locked condition; l0 A Fig. 2 is abottom plan view thereof; Fig. 3 is a transverse sectional View taken along the lines 3 3 and in the direction of the arrows as indicated in Fig. 1; Fig. 4 is a sectional view taken along the lines eand in the direction of the arrows as also indicated in Fig. l;

` Fig. 5 is a sectional view taken on the line 5 5 of Fig.- 2 showing the parts ina position in which the detent or projection 3i is riding on the plate 28 intermediate the recesses 312 and 32';

Fig-6 is a transverse sectional plan view taken along the lines dand in the direction of the arrows as indicated in Fig. 3.

Throughout the several views, the fastener as- Y sembly has been shown in association with sheets of material i@ and il; it being assumed that these sheets are to be secured against movement Y formed with apertures or recesses to receive the parts of the assembly and in the case 'of sheets the outermost should preferably be dimpled" as indicated at i2. This dimpling denes the aperture I 2a of sheet it while the aperture i 3 of sheet il may simply be a circular opening. By such a construction, the depressed portion or dimple i2 may extend into and, in fact, beyond the plane of the sheet ii, and the head Id of the operating stud 9 of the assembly maybe substantially housed within the depressed portion provided by the dimple 2.

t is preferred that a stud,A in accordance with the teachings of the present invention, include a i Y head portion it which may be formed with a recess or groove i5 of any desiredvconfiguration to receive one of a number oi' suitable operating implements, and by means of which it may be turned. The under face ita` of the head id is preferably ared to extend at an angle corresponding to that of the dimpling I2 and so that a `faceftc-iaoe contact of these parts results. The

- their leading edges.

- 3 shank I5 of the stud A9 portion tapered, as indicated at Ila and Hb; to substantially a point, as indicated at Il. to provide a guide structure for the stud. Moreover. the 'stud 9 presents a relatively narrow and llattene'd shank portion I5, the side edges of which are threaded es indicated et is, while the lock member 28 and spring or resilient means 38. The housing 2| is secured to the under face of the sheet or member II by. for example. rivets 2li. Conveniently, the housing 2| may be provided with ilanges or ear portions 22 to furnish mountings for the' rivets. The sheet engaging face 22 of the housing 2| may be formed with a circular opening 22a concentrically dlsposed'with reference to the opening I2. The opposite face 22 of the housing 2| -may be'iormed with an opening 22a.

Extending through the latter opening 24a and preferably beyond the housing 2| is a nut 25 formed with threads as indicated at 28. The diameter and pitch oi' these threads is such that they may cooperate with the threads i8 of the shank I5. Also, as shown in Fig. 6. the threads i8 maybe reduced at points 28 and 4| adjacent As shown in Fig. 6. this reduction at the leading edge o! the thread is made at the root of the thread as well as the top oi' the thread. In any event, this will result in ready cooperation of the thread portions of the stud 9 and nut 25. The threads 25 are interconveniently has its end rupted by longitudinal grooves 21 in the nut 25,

as shown especially in Fig. 3.

The grooves or interrupted portions 21 of the nut 25 are of a sumcient depth to loosely receive v the broadest transverse dimension of the stud shank I5 and said grooves 2|.` will, therefore, re-

4 ceive the threads I8 oi' the shank I8 when the threaded edges of the latter are aligned with said grooves 21 Vand the shank I5 is inserted within the bore of the nut 25; under such conditions; of course, with the shank i8 inserted within the bore of the nut 25', the shank and nut may be freely moved axially with respect to one another. When however, the shank I8 is inserted within the bore of the nut 25, as Just described. and the shanky I5 and nut 25 are rotated relative to one another. it will. be obvious that the threads |8 of the studshank I5 will become interengaged with the threads 25 of the nut 25 to restrain relative axial 'movements of the stud 8 and nut 25.

Now with a view to providing means which will prevent or, restrain relative turning movements of the shank I8 with respect to the nut 25v when the parts have been adjusted to' proper position with the stud andthreads interengaged, it will be observedthat' a lock member comprising a plate 28 is'supported upon the. flange 29 which extends from a point, adjacent the .inner edge of the opening 88, however, is preferably of a suihcient-y ly large area' that a loose ilt between the parts 28 and I5 is assured. Accordingly, with the plate 28 disposed upon the ange 28,0: the nut 25 and the opening 38 aligned with the grooves or interrupted portions 21` of the threads 25, the stud 9 may freely be inserted into and withdrawn from the assembly.

A detent structure is furnished by conveniently striking out a projection or rib 3| from the under face of'the plate 28 and forming the -upper face of the flangel 29 with a pair of recesses 32 and 32' adapted to receive the projection 8|. A spring 32 may be interposed between the plate 28 and the inner face of ilange 28 of the housing 2|, thus constantlyurging the plate 28 into contact with the flange 29. In order to prevent sidewise displacement of the plate 28 with reference to the-nut 25, a gu'ide structure is furnished. This structure may conveniently include a groove 28 of arcuate conilguration and formed in the upper or outer tace of ilange 29. A projection or tab 35, also conveniently formed by indenting the plate 28, rides within this groove 82. It is thus apparent that sidewise displace-r 'ment of the plate 28 with reference toithe nut 25 is prevented, although rotation of these partsv relative to each other may occur. Additionally, this structure serves a function somewhat in the nature of a stop element. In other words, the limits of the groove define the limits of movement of the projection 8| when it is in registry with either of the recesses 22 or 82'.

Thus when pl'ate 28 is rotated relative to the nut 25 so that the projection 8| is engaged in the recess 32', the opening 88 will be aligned with the grooves 21- to permit insertion of shank i54 through the plate 28 and within and axially of the bore of the nut 25. When, thereafter, the shank I5 is rotated relative to nut 25 to engage the threadsi8 and 28. the plate 28 will likewise be rotated, by the shank I5 engaging the correspondingiy formed opening 30, until the projection 2| engages inthe recess 32, as seen in Fig. 4.

zwhereupon, it will be noted, the shank and nut threads I8 and 25 will be fully cooperatively engaged. At all times, during relative rotation of the' nut.25 and plate 28, the projection 35 on the latter rides in the groove 82, serving to prevent sidewise displacement of the plate 28 relative to the nut 25. Thus with the construction as illustrated, it is apparent that when the projection 2| is engaged with one of the recesses 22 or 82',

-, the opening 80 will either be in substantial regisnut body 25 atan angle thereto. The junctureV of the' flange 'nf-withV nut body A25 provides an" angular portionf'o'rming a part of the nut 25 and extendingbetween the nut Abody and the ilange..

This'plate 28. as especially shown in Fig. 4, is

.formed with an opening of a vconguration generallycorresponding to the shank I8.V This try with the interrupted portions 21 of the thread with such interrupted portions.

If desired. means maybe provided for retaining the stud 8 in association with the sheet I8 when the sheets I8 and II lare to be separated upon release of interlocking cooperation of the stud 8 and nut 25. As illustrated, such means may comprise a washer or like member 25 non-rotatably s' mounted on the shank I5 of the stud for movement axially of the shank I5; and a pin, or the like, 81 may be inserted through a suitable hole drilled transversely through the shank I8 and peened over against the opposed unthreaded'sldes ofthe shank I5 to provide slight protrusions or ear portions 21a and 2lb extending from the unthreaded sides of the shank I8 and integral therewith. The ,protrusions 31a and aib win pass f through the opening 38 in the lock member 28 and through the opening 38a in the spring 22, so as to permit the st ud 8 to be withdrawn therefrom; but said protrusis 31a and 81h will not pass through the opening in the washer 3 6 which moreclosely ntsA the stud shank IS.' Thus the' stud 9 will be retained in association with the i sheet lo, upon release of interlocking cooperation 1 of the shank i@ and nut 25,by engagement o f with its opening 23a in substantial alignment with the aperture i3. As shown, the opening 24a in the housing 2l, is relatively larger than the circumierence of the nut 25, and the nut flange 29 is slightly smaller than the interior of the housing 2|, to accommodates. limited lateral vshifting of the nut 25 and plate 28 assembly to enable proper alignment or centering of the opening 3U and bore of the nutl 25 with the opening I2a whereby to permit insertion of the shank i6 through same into the bore of the nut 25. The ange 29 is substantially square so as to substantially conform to the interior configuration of the housing 2i so that only a very limited degree of relative rotation of the nut 25 and housing 2i is possible. The stud 9 is introduced through the opening i2a dened by the dimple l2 in sheet I0. If the parts are not in perfect registry, the locking member 2d and nut 25 assembly may shift 'laterally within the housing 2| as the stud isl introduced. This will occur because the nose portion il will cam against the endedges of the opening 36 of the plate28. The locking member 28 and nut 25 assembly is suiciently loosely mounted within the housing that a limited amount of shifting may occur. In other words, the structure is' self-centering. Continued projection of the shank will cause the latter to enter the opening 30, as well as the bore of the nut 25.

In the passage of the shank I6 Vwithin the-bore oi the nut 26, the threads IB will, of course, ride within the grooves or interrupted portions 2lV of the nut threads 28. As the head I4 comes to rest Within the dimple and with the sheets l andl 4Ii or other members in proper contact, further penetrative movement of the stud 9 will cease. Thereupon, the operator, by simply introducing a proper implement or tool into the slot il or its equivalent, may turn the stud 9' with reference to the nut so that the shank threads I8 are caused to engage the nut threads 2l.

During the entire foregoing operation, it will be understood thatsldewise displacement of the A plate 2d with reference to the nut 25 is' prevented A 6 clamped. To release this operation is resorted to. v

From the foregoing it will be apparent that, with the parts' assembled' as shown, the lock mem-f ber 28 may bereleasably locked in either of two positions. In one of these positions, the opening 30'is aligned with the grooves 21 of the nut 25, permitting the insertion of the stud shank IS engagement, a reverse into the bore of the nut 25. In this'position'ft'he projection 3i is' engaged in the recess 32' with sunlcientforce by theaction of .the spring 33 to positively maintain the locking member` 28 against accidental rotation relative to the nut 25, and

the assembly is'thus maintained readyto receive the stud 9. When the stud shank iii is inserted through the opening 36 into the bore of the nut 25and thereafter the shank i6 is rotated until the -projection 3i engages in the recess 32, the

l lock member becomes locked in its second locked by the guide structure which has been previously described. A rotation of the stud 9 will result in the projection 35 riding within the groove 34. A lso, it will result in the 'projection 3| riding out of one of the recesses 32 or 32' as'particularly shown in Fig. 5. Under these circumstances, the detent function and structure will becomeinoperative. Therefore, no restraintwill be placed upon the rotation of the plate 28 with reference to the nut. The detent will, howeven-again becomevoperative when the projection rides into the second recess v32. In that. position. as seenin' Figs. 1 and 3, and with the parts as shown, the threads Il of the stud 9 will be midway between the interruptions 2l and in engagement with the threads 2l. Thus, the parts will be firmly position, at which time it will be apparent that the shank threads Iii will-be fully engaged with the nut threads 2B to restrain relative axial movements of the stud s and nut .25, and also at such time the engagement of the projection 3l .with the recess 32 will, due to the action of the spring 33, positively restrain accidental relative rota# 'tion of the stud Q and nut 25.

y'I'hus there is provided a fastener construction which requires merely insertion of the stud axially into proper relation with the retaining means and subsequent rotation of the stud from thel position of insertion in order to positively lock together the members, s'uch as sheets i0 and il, with which the fastener construction of the invention is used. lIn the use -of Ithe invention the lock member 28 is readily locked m'position ready to ceived in the respective recesses 32 or 32'. This audible signaling feature of the constructiony enable the operator to lbe lassured that the device is in the desired stud receiving or stud locking coindition.

From the foregoing, it will be understood that, among others, the several objects of the invention as specifically aforenoted are achieved. Obviously. numerous changes in construction and rearrangments of the parts might be resorted to without departing from the spirit of the inventionas denned by the claims.

I claim:

1. A fastener comprising a receptacle, a nut mounted within said receptacle, a locking plate associated with said nut and contained within said receptacle, a resilient locking element positioned in said receptacle and in operative engagement with said plate. a locking stud adaptedto be inserted through said member and plate into turned, and means for limiting the turning move ment of said stud.

2.-A fastener device of the type adapted to secure plates together detachably. `comprising a receptacle and means for secusing said receptacle to one oi.' said plates, a nut loosely mounted within said receptacle. alocking plate provided said receptacle and in engagement with said nut, a resilient locking element positioned within said receptacle and constructed and arranged to bias said plate into engagement with said nut, a. locking stud adapted to be inserted through another .of said plates and. through Sid member and plate into engagement with said nut, the cross-section of said stud conforming substantially with the shape of said opening in said locking plate, means on said plate for effecting locking cooperation between said stud, plate and nut when said stud and plate are turned relaf tive to said receptacle, and means for limiting the turning'movement of said stud and plate.

3. A fastener device of the type adapted to secure plates together detachably, comprising a receptacle and means for securing said receptacle theturning movement of said. stud and plate when' said' detents are in locking engagement:

with said recesses.

e. A fastener device of the' type adapted zo secure -plates together detachably, comprising a receptacle and means for securing said receptacle to one of said plates, a nut carried by said receptacle, a locking plate' provided with a stud receiving opening mounted within said receptacle to one of said plates, a nut loosely mounted with-V in said receptacle and provided with a recess,l

a locking plate provided with a stud receiving openingl mounted within said receptacle and in engagement with said nut, a locking stud adapted to be inserted through another of said plates and through said member and locking plate into engagement with said nut, the cross-section of said stud conforming substantially with theshape of said opening .in said looking plate, detent means on said locking plate adapted to engage said recess in said nut for enacting locking cooperation between said stud and locking plate when turned/frelative to said receptacle.

and means for limiting the turning movement of said stud Ifand locking plate.

4. A fastener device for use in securing together a, plurality of plates comprising a receptacle, a, nut mounted within said receptacle for lateral shifting movement relative thereto, means on said nut preventing rotation thereof in said receptacle, a turnable locking plate, a spring `located in said receptacle and constructed and arranged to urge said plate against said nut, a locking stud having an interrupted thread adapted to be inserted through said spring and plate for engagement with said nut, said plate and nut having openings'conforming substantially with the cross-section of said stud. means on said plate and operative when said plate has been turned by said stud for securing said stud in locked position in said nut relative to said receptacle, and means on said plate limiting turning movement of said plate and stud into locking position. j f

5. A fastener device for use in detachably securing together a plurality of separable members, comprising a receptacle, means for attaching said receptacle to one of said members, a nut having a non-circular flange loosely mounted in said receptacle with a portion of said nut extending beyond said receptacle, said flange oi said nut being furnished with recesses, and said flange being of a shape to prevent rotation of said nut in said receptacle, a locking stud having' an interrupted thread, means for securing said stud for turning movement in said other of said plates, a locking plate located in said reand in engagement with said nul?. a resilient locking element positioned within said receptacle andconstructed and arranged to bias said plate into engagement with said nut, a locking stud adapted to be inserted through another of said plates and through said member and plate into engagement with said nut, the cross-section of said stud conforming substantially with the shape of said opening in said locking plate; means on said plate for effecting locking cooperation between said stud, plate and nut` when said stud and plate are turned relative to said receptacle, and means for limiting the turning movement of said stud and plate.

y 7. A fastener device of the type adapted to secure plates together detachably, comprising a receptacle and means for securing said receptacle to one of said plates, a nut loosely mounted within said receptacle and provided with a recess, a locking plate provided with a stud receiving opening mounted within said receptacle and in engagement with said nut, a locking stud adapted 8. 'A fastener device for use in securing together a plurality of members comprising a receptacle, locking detents on said plate constructed against said iiange of said nut', said spring having an opening through which said stud may be inserted', and means on -said plate for limiting cliptacle, a'nut carried by said receptacle, a turnfable locking plate in said receptacle, a spring located in said receptacle and constructed and arranged to urge said plate against said nut, a locking e stud having -an interrupted thread adapted to be inserted through said spring and plate for engagement with said nut, said locking plate and nut having openings conforming substantially with the cross-section of said stud, means on said locking plate and operative when said locking plate has been turned by said stud for securing said stud in locked position in said nut relative to said receptacle, and means on said locking plate limiting turning movement of said locking plate and stud into locking position.

9. A fastener device for use in detachably securing together a plurality of separable members, comprising a receptacle, a nut carried by said receptacle. said nut being furnished with recesses. a locking stud having an interrupted thread, means for securing said stud for turning movement in one of said members, a locking plate located in said receptacle, locking detents on said plate constructed and arranged to coact with said recesses, said stud and said nut being provided with openings conforming substantially in shape to the cross-section of said stud. a bowed ilat spring secured within said housing and pressing said plate against said nut, said spring having an opening through which said stud may be inserted, and meanson said plate for limiting the turning movement of said stud and plate when said detents are in locking recesses.

engagement with said said receptacle to one of said members, a nut loosely mounted within said receptacle, a locking plate provided lwith a stud receiving opening mounted within said receptacle andinengagement with said nut, a resilient locking element positioned within said receptacle and constructed and arranged to bias said locking plate into engagement with said nut, a locking stud adapted to be inserted through another of said members and through said element and locking plate into engagement with said nut, the cross-section of said stud conforming substantially with the sham of said opening in said locking plate, means on said locking plate for eiecting locking cocperation between said stud, locking plate and nut when said stud and locking plate are turned relative to said receptacle, said last-named means producing an audible click when moving into or out of locking engagement with "said nut, and means for hunting the turning movement of said stud and locking plate.

l 1l. A fastener device for use in securing together a plurality ofr plates comprising a receptacle, a nut mounted within said receptacle, a turnable locking plate, a spring located in said receptacle and constructed andai-ranged to urge 'said locking plate against said-nut, a locking stud having an interrupted thread adapted to be in serted through said spring' and locking plate for engagement with said n'utfsaid locking plate and nut having openings conforming substantially with the cross-'section of said stud. means on said locking plate 'end operativewhen said locking Y plate has been turned bys'aid stud for securing said stud in locked position in said nut, means on said locking plate limiting turning movement of said plate and stud into locking positlol'le'and other means on said plate limiting turning movement of said tion.` K

l2. A fastener device of the type adapted to seplate and stud into unlocking posi- Vcure plates together detachablm comprising a receptacle and means lfor securing said receptacle to one of said plates, a nut carried by said receptacle and provided Vwith a plurality of sets of recesses, a locking plate provided with a stud receiving opening also carried by said receptacle and in engagement with said nut. a loclnngstud adapted to be inserted through another of said plates and through said member and locking plate into engagement with 'said nut, detent means on VSaid locking .plate adapted t0 8118588 One 0f Said sets'of recesses ior'eiiecting locking cooperation between said stud and locking plate when turned relative to said receptacle, and to engage another 30 set'of recesses insaid nut when said studand locking plate ere turned 1n the pposiee'direcuon to unlocking position,'meam for. limiting the"`l` aperture of a mounting member, retaining means mounted by said shank and to'bear against'the face -of 'said mounting member -to prevent ref movalof said stud therefrom, a tongue forming said shank being adapted to extend through the 70 adjacent said shank, a projection extending from the latter and engageable by said tongue; said 'retaining means with the tongue displaced to clear said projection passing beyond said shank. 14. A stud-receptacle assembly for a fastener, said assembly including a nut, a housing formed with an opening through which said nut projects. a flange member extending from said nut and within said housing, a plate member rotatably mounted by said ilange and formed with a slot to permit passage of a stud shank, one of said rmembers being formed with recesses, and ribs extending from the second of said members and into said recesses to restrain relative rotation oi said members when the latter are in predetermined positions.

15. A stud-receptacle assembly for a fastener, said assembly including a housing formed with an opening, a nut body projecting through said opening, a flange and an angular portion forming a part of said nut, said angular portion extending between the lbody and said flange, anda locking plate rotatably supported upon the lliange of said nut and presenting a body lying adjacent the angular portion thereof.

i6. A stud-receptacle assembly for a, fastener, said assembly including a housing formed with an opening, a nut body proj ecting through said opening, a flange and an angular portion forming a part'of said nut, said angular portion extending between the body and said flange. a locking plate rotatably supported upon` the iiange of said nut, and presenting abody lying adjacent the angular portion thereof, anddetent means cooperating with said plate and nut to normally maintain the latter in predetermined positions with respect to each other. f

1'?. A stud-receptacle assembly for a. fastener, said assembly including a housing formed with an opening, a nut body projecting through said opening, a ange and an angular portion yform-- ing a part of said nut, said angular portion extending between the body andl said flange, and a locking plate rotatably supported upon the ange of said nut, and presenting a body lyingl adjacent the angular portion thereof, both said nut and plate being slotted to permit of the .passage of a stud shank, and detent means cooperating with said plate Vand nut to normally maintain the latter in predetermined positions with respect to each other.

18. A fastener assembly including incombina- Y tion a 'stud member comprising a flattened shankv formed with screw threads'in kits outer edges, a. nut includingra body and a detent plate rotat- Yably mounted by said body, said plate being formed with a, slot permitting` thel passage of said shank but preventing relative rotation of the shank with respect to the same, said nut being formed with interruptions. in its threads, and ribs and cooperating recesses formed in said plate and nut to prevent relative rotation ofthe same.

19. A stud-'receptacle assembly for aA fastener,

ysaid Vassembly including, in combination, a nut said plate member withrespect to said nut mem- 20.l A stud-receptacle 'assembly for a fastener,

said Vassembly* including, in combination. a nut and extendable into said grooves to provide a detent structure. N

21. A stud-receptacle assembly for a fastener, said assembly including, in combination, a nut member, a lock plate memberv rotatably supported thereon, a tab extending from one of said members,\the second of said members being formed with an arcuate recess and within which said. I

tab rides, said tab, in conjunction with the end walls of saidrecess, providing a stop structure limiting the rotational movement of said plate member with respect to said nut member, one of said members being. formed `with recesses, ribs forming a part of the second of said members and extendable into said recesses to provide a detent structure, a shell formed with an opening through which said nut member extends, a. spring bearing against said plate to cause the latter to engage said nut and to also cause said nut to-,bear

against: said shell, and inwardly extending flange portions forming a part of said shellf and supporting said spring.

22. A stud-receptacle assembly for a fastener, said assembly including, incombination, a nut member, a lock plate member rotatably supported thereon, a tab extending from one of said members, the second of saidmembersbeing formed with an arcuate recess and within which said vtab rides, said tab, in conjunction with the end 'Walls of said recess, providing a stop-structure limiting the rotational movement of said plate member with respect to said nut member, one of said members being formed with recesses, ribs forming a part of the second of said members j and extendable into said recesses to provide a detent structure, a shell formed with an opening through which said nut member extends, a spring bearing against said plate to cause the latter to engage said nut ,and to also cause said nut to bear against said shell, spacing means associated with V said shell, said spring bearing against said spac-i ing means, and means for securing said spacing other of said members and integral therewith to lie within said recess and, in cooperation with the said receptacle and extending through said opening, said nut being formed with interrupted screw threads, a plate rotatably mounted with respect to said nut and formed with a slot through which the shank of a stud may project. and stop means for preventing rotation of said plate with respect to said nut and beyond predetermined positions.

27. In a fastener assembly, a stud receptacle formed with an opening, a nut disposed within said receptacle and extending through said opening, said nut being formed with interrupted screw threads, a plate rotatably mounted with respectv to said nut and formed with a slot through which the shank of a stud may project, stop means for preventing rotation of said plate withrespect to said nut and beyond predetermined positions, and detent means forming a part of said plate and nut for restraining relative rotation of the same.

28. In a fastener assembly, a headed stud including a shank formed with interrupted threads, said shank being adapted to extend through the aperture of a mounting member, and retaining means mounted by said shank and to bear against the face of said mounting member to preventv removal of said stud therefrom.

29. A stud-receptacle assembly for a fastener,

said assembly including a housing, a nut proiect- I ing from said housing and movable within the same, a spring acting against said nut to normally maintain the same in predetermined position within said housing, the ends of said spring being normally spaced from the inner edge faces of ing in said receptacle, stop means on the ange means and shell against movements withrespect to each other. i

23. In a fastener assembly, in combination, a nut member, a lock plate member rotatably supported thereon, .a tab extending from one of said4 members, the second oi said members being formed with an arcuate recess and within which said tab rides, said tab, in commotion withvthe end walls of said recess, providing a stop structure limiting the rotational fmovement of said plate member with respect to said nut member,

` a stud to extend through `an opening in said plate and into the. bore of said nut, integral ear portions forming a part of said stud and extending beyond the body of the same, and stud-retaining means slidably mounted upon said stud and secured against displacement with respect to j the same by said ears.

24. A stud-receptacle assemblyjor a fastener, said assembly including, in combination, a nut member, a lock plate member rotatably supported thereon, one of said members having an arcuate recess, and a tab extending upwardly from the of said nut, a locking plate, a spring within said receptacle pressing said plate against said ilange,

a locking stud adapted to be inserted through said spring, and plate for engagement with the threads of said nut, and a projection on the edge of said plate constructed and arranged to engage said stop means to prevent further turning movement of said stud and plate relative to said flange when Y A of said plates andV through said element and plate into engagement with saidnut, the cross-section.

` f 13 of said stud conforming substantially with the shape of said opening in said locking Plate, means on said plate for eirecting locking cooperation between said stud, plate and nut when said stud and plate are turned relative to said receptacle. means for limiting the turning movement of said stud and plate. said means `including a ange formed on said locking plate, and means on said nut engaged by said ange for `preventing turning l movement of said stud.`

32. A fastener device of the class described comprising. in combination a nut member, and a locking stud adapted for cooperation with said comprising, in combination a nut member, a receptacle adapted to receive `said nut member, and a stud member for cooperation with saidnut jmember, said .nut and stud members having cooperating threads, the threads on said stud member being reduced at'their leading edges at the Aroot of the thread and at the top of the thread.

MARK HATTAN.

member and stud having 

